Terrance DeJesus
1c10c37468
* updated timestamp override unit test; fixed rules missing this field * fixed flake error * simplified and consolidated logic * Update tests/test_all_rules.py Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com> * Update tests/test_all_rules.py Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com> * added comments * updated logic; added comments; removed unused variables * removed custom python script * updated dates * removed deprecated rule change * updated dates --------- Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
78 lines
2.4 KiB
TOML
78 lines
2.4 KiB
TOML
[metadata]
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creation_date = "2023/05/17"
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integration = ["endpoint", "network_traffic"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2024/01/05"
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[rule]
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author = ["Elastic"]
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description = '''
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This rule identifies a potential port scan. A port scan is a method utilized by attackers to systematically scan a
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target system or network for open ports, allowing them to identify available services and potential vulnerabilities.
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By mapping out the open ports, attackers can gather critical information to plan and execute targeted attacks, gaining
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unauthorized access, compromising security, and potentially leading to data breaches, unauthorized control, or further
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exploitation of the targeted system or network. This rule proposes threshold logic to check for connection attempts
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from one source host to 20 or more destination ports.
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'''
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from = "now-9m"
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index = ["logs-endpoint.events.network-*", "logs-network_traffic.*", "packetbeat-*", "filebeat-*", "auditbeat-*"]
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language = "kuery"
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license = "Elastic License v2"
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max_signals = 5
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name = "Potential Network Scan Detected"
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risk_score = 21
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rule_id = "0171f283-ade7-4f87-9521-ac346c68cc9b"
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severity = "low"
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tags = ["Domain: Network",
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"Tactic: Discovery",
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"Tactic: Reconnaissance",
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"Use Case: Network Security Monitoring"
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]
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type = "threshold"
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timestamp_override = "event.ingested"
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query = '''
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destination.port : * and event.action : "network_flow" and source.ip : (10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16)
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1046"
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name = "Network Service Discovery"
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reference = "https://attack.mitre.org/techniques/T1046/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1595"
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name = "Active Scanning"
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reference = "https://attack.mitre.org/techniques/T1595/"
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[[rule.threat.technique.subtechnique]]
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id = "T1595.001"
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name = "Scanning IP Blocks"
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reference = "https://attack.mitre.org/techniques/T1595/001/"
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[rule.threat.tactic]
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id = "TA0043"
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name = "Reconnaissance"
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reference = "https://attack.mitre.org/tactics/TA0043/"
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[rule.threshold]
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field = ["destination.ip", "source.ip"]
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value = 1
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[[rule.threshold.cardinality]]
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field = "destination.port"
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value = 250
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